Forgot to add two functions.

[zophiana]

You had forgot to add the "visit_MinusNode" and the "visit_PlusNode" in the interpreter file.

[jackprogramsjp]

Thanks for putting this, @Ungedummt

[mohammadr09]

For me, it gives me an error saying init() missing 1 required positional argument: 'value'

[zophiana]

I forked this project. You can find it here.